Shen Kua Essays (657 words) - Technical Writers, Ethnographers

Shen Kua Astronomer, Shen Kua was born in China in the year 1026. His family had an unbroken tradition of being civil servants. Thus his father was a local administrator of many posts from Szechwan in the west to the international port of Amoy. At Sixteen years old Shen Kua left his home to travel with his father from post to post. While traveling with his father, Shen Kua learned the responsibilities of a local administrator. These responsibilities include a broad range of technical and managerial problems in public works, finance, improvement of agriculture, and maintenance of waterways. In 1051 his father died and after a two year mourning period Shen Kua received his first appointment as a local administrator at the age of twenty two. Soon after his appointment he showed his skill in ability to plan by designing and overseeing a drainage and embankment system that reclaimed some hundred thousand acres of swampland for agriculture. A few years later he passed the national examinations and was assigned a post in Yangchow. While in Yangchow he impressed the Governor Chang Ch'u so much that he recommended that Shen be appointed to the department of Financial Administration. It was about this time that he began to study astronomy. His first works as an astronomer came when he set down clear explanations concerning the sphericity of the sun and the moon as proved by lunar phases, of eclipse limits and the retrogradation of the lunar nodes. These explanations gave the ability to visualize motions in space Which in the past was only best implicit in numerical procedures of traditional astronomy and seldomly discussed in technical writing. Because of this work Shen was given an additional appointed as director of the Astronomical Bureau. His first project as director was a major calendar reform. This reform started with a series of daily observations of the stars that lasted over five years. While these observations where being performed Shen realized the need for a major redesign of major astronomical instruments. The most significant change that Shen made was to the gnomon. The gnomon was still being used to measure the noon shadow and fix the solstices. Shen redesigned the armillary sphere that is used to make angular measurements, and the clepsydra which determines the time that observations are made. He improved the armillary sphere by improving the diameter of the naked eye sighting tube. Shen noticed that the polestar could no longer be seen in the sighting tube at night. He slowly widened the tube by using the plots of the polestar three times a night for three months to adjust the aim. His new calibration revealed that the tube was slightly three degrees off. The clepsydra also had calibration problems as well, in the past day and night were separately divided by hours. Shen realized that day and night hours were different from season to season. The time was read from float rods in an overflow-tank. Shen saw these problems and proposed a new design for these float tanks. Shen also made his mark in his discussions of solar, lunar, and eclipse phenomena. This by far was the most extraordinary of his cosmological hypothesis that accounts for variations in planetary motions that include retrogradation. Shen noted that the greatest planetary anamoloy happened near stationary points. He proposed a model that suggested that the planet moved in the shape of a willow leaf attached to one side of a periphery circle. The way the planets changed thier direction of motion in respect to the stars was explained by the travel from one point of the leaf to the other. This served the same purpose as the epicycle served in Europe Shen's writings were in part considered to be the highest achievement in traditional Chinese mathematical astronomy. After his impeachment from office at the age of fifty-one Shen moved to a small piece of land in the country. It was there that Shen completed three books and an atlas of China. One of these books was called "Brush Talks From The Dream Brook". This book includes some of Shen Kua's most elaborate ideas on such things as regularities underlying the phenomenal, technical skills, deliberations of materia medica, and many miscellaneous notes.

Describing Sizes and Dimensions in Spanish

Describing Sizes and Dimensions in Spanish Here are three common ways to express measurements in Spanish. Deciding which ones to use is largely a matter of personal preference since they are interchangeable in most cases.   1. Medir   This verb, which is conjugated irregularly, generally means to measure. Examples: Mido cinco pies y cinco pulgadas de alto. (I measure 5 feet, 5 inches tall.) Los cientà ­ficos hallaron un fà ³sil que mide dos metros de largo. (The scientists found a fossil that measures two meters long.) 2. Tiene This verb literally means to have. It can be used to directly indicate dimensions. It also is conjugated irregularly. Examples: El centro comercial tiene tres kilà ³metros de largo. (The commercial center is three kilometers long.) Si antes tenà ­a cinco metros de profundidad, ahora tiene dos. (If it was five meters deep before, its now two meters.) 3. Ser de This is the rough equivalent of saying in English that something is a certain size. Note the use of the preposition de, which is not translated to English. This method of describing dimensions is less common than the other two. Examples: El rea es de 160 metros cuadrados. (The area is 160 square meters.) Las dimensiones del nuevo almacà ©n son de 25 por 70 metros, y la altura es de ocho metros. (The horizontal dimensions of the new warehouse are 25 by 70 meters, and its height is 8 meters.)

Personal Statement Essay Example | Topics and Well Written Essays - 750 words - 3

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